401801902 has 24 divisors (see below), whose sum is σ = 662346360. Its totient is φ = 182555520.

The previous prime is 401801899. The next prime is 401801903. The reversal of 401801902 is 209108104.

It is a happy number.

It is a super-2 number, since 2×401801902² = 322889536901635208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401801903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4777 + ... + 28747.

It is an arithmetic number, because the mean of its divisors is an integer number (27597765).

Almost surely, 2^401801902 is an apocalyptic number.

401801902 is a deficient number, since it is larger than the sum of its proper divisors (260544458).

401801902 is a wasteful number, since it uses less digits than its factorization.

401801902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24036 (or 24019 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 401801902 is about 20044.9969319030. The cubic root of 401801902 is about 737.9110198414.

The spelling of 401801902 in words is "four hundred one million, eight hundred one thousand, nine hundred two".